Posts by Maniero • 444,682 points
6,921 posts
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answer333
viewsA: Message in "print" is not printed on the screen, how to fix?
It’s simpler than this. if input("seu nome") == "jefferson": print("JFP") Behold working in the ideone. And in the repl it.. Also put on the Github for future reference. Do you have a reason to…
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answers226
viewsA: Build error in C++ when accessing structure in function
The code has several problems, and gives an indication that it does not understand what it is doing. Learning to program should be step by step, learn to lay each brick to build the whole house,…
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answers417
viewsA: Counter of a subsequence of repeated strings in C
The problem is that the menor starts already with a very low number, so it gets complicated. In the same way that initialized the maior with the lowest possible number, you have to initialize the…
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answer75
viewsA: How does Oracle act after running a PHP script without a commit?
PHP does nothing because it is a programming language, the question is whether the library does, but what is it using? The default, in the DB default configuration? It does not make automatic. It…
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answers61
viewsA: Variable keeps zeroed in a mathematical expression
You’re making an unnecessary conversion and too late. When you make a division with integers, you will have the result as an integer, and the integer of the obtained result is 0. If you want the…
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answers169
viewsA: When to use Stringbuilder and Stringbuffer instead of concatenating with "+" operator in Java?
Depends on how you use the +. If it is a simple concatenation, done all at once in a single expression, it is efficient and can use without fear, this is converted to a method that makes…
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answers1237
viewsA: What is the difference between substr and substring?
substr() you go from the initial position indicated by the first argument to the amount of characters indicated by the second argument, that is to say the second argument is a length of the portion…
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answers132
viewsA: Error concatenating component value in query
Imagining you’re wearing one Command it is right to do this: comando.CommandText = @"select nome as Nome, endereco as Endereço, telefone as Telefone, dataCadastro as [Data de Cadastro] from clientes…
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answers259
viewsA: Calculation of tenths of a second
You don’t get all that precision in every browser and every computer, and not only that, the human can’t even tell the decimals right by changing. To tell the truth, most regressive time counters…
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answers2226
viewsA: Switch string to high box and remove blanks
The first only takes spaces from the beginning and end, the middle would be the second code, but it is not changing anything, the code says to trade anything for nothing, that is, it does not move,…
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answer83
viewsA: Partitioning the algorithm into functions
I separated the user interaction part with the algorithm itself and made the communication through parameter and return. #include <stdio.h> int Inverte(int n) { //n é um parâmetro que recebe o…
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answer130
viewsA: Optimization with GCC
Yes, it is possible, although this code doesn’t seem to make much sense: #include <stdio.h> int main(void) { const char str[7] = "string"; const char *str1 = str; if(str == str1)…
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answer39
viewsA: Incompatible types when trying to start a class with the "switch" value of another Java
Changing the order of the arguments will solve: novasBalas.add(new Bullet(area, x, y, Direcao.LEFT)); I put in the Github for future reference. Note that the direction is the last parameter in the…
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answers713
viewsA: indexof does not find element in an array
Let’s print out what you’re having searched: pessoas = []; pessoas.push({"nome": "Pedro"}) pessoas.push({"nome": "João"}) pessoas.push({"nome": "Maria"}) pessoas.push({"nome": "José"}) for (let…
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answers113
viewsA: Doubt integration test
In a very simplified way and doing it a little bit more correctly, but not ensuring that it is 100% correct for the lack of context of the question would be this: public bool ValidaCampos(string…
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answer4757
viewsA: Compare two lists of objects and pick only the different ones
You must use the Except() of LINQ, which I use joins the lists without distinguishing what is already in the other. var listaProdutosDiferentes = listaPrincipalProdutos.Except(listaFinalProdutos);…
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answers144
viewsA: Recursive printing in triangle format
All I had to do was put the number in place of the "@": #include <stdio.h> void triangulo(int n) { for (int i = 1; i <= n; i++) { for (int j = 1; j <= i; j++) printf("%d ", j);…
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answer6449
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answer115
viewsA: No less `csc` works on Mono
No, Mono is the equivalent of . NET originally created to run on other platforms, and have an alternative implementation with different features. Today it is less necessary because o . NET has…
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answer1266
viewsA: How to add elements to the tuple using a function?
You probably don’t understand how the function works. In this case it executes something and discards any information obtained from it. If you want a value obtained within the function to be…
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answer170
viewsA: Differences between __name__ and __qualname__
It is exactly the same in the basic use. In the example quoted it does not change. But when you have nested classes or functions it changes. Using a more complex example see that only the higher…
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answer232
viewsA: Use of Generalization/Specialization in Data Modeling
I don’t really like this idea. To tell you the truth it is more absurd and if applied creates very strange things. At least in the database if you do the generalization the right way is not to have…
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answers341
viewsA: What would be the correct way to verify if a value exists in the table in Lua?
There’s nothing ready, you can create a function that does this, like this: local function contains(tabela, valor) for i = 1, #tabela do if tabela[i] == valor then return true end end return false…
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answer126
viewsA: How do I change the order of entering the Mysql database?
There is no such thing as what you are thinking about. The database is a data storage and query mechanism. You don’t establish how it will be stored, that’s his problem to do, the data is just…
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answers139
viewsA: Is it possible to rewrite any code that uses pointers (C#) without using pointers in Node.js?
Possible is yes, all programming languages can do anything. The issue is the work that gives, is usually so much, the risk is so great, that rewriting will be bad, writing the same thing from…
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answer82
viewsA: Is it possible to place an HMTL file within the data set?
The file itself is not possible, after all file is a concept of the operating system file system, but a text that is an HTML is entirely possible. It doesn’t even have to be a BLOB. It may be that…
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answers3324
viewsA: Ignore if it is uppercase and lowercase in the string
You can use the lower() to make everything tiny. Whenever you have a question if you have a function to do something, you can look in the official documentation about the type of data you are…
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answer155
viewsA: Use multi-tenancy model or other types?
The way you think best. We have no way of knowing what is best without knowing every detail, and especially how it might happen in the future. The technology you use or the amount of users, in…
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answer390
viewsA: Problem with calculating the mean in C language
The code is very confusing and this helps make it difficult to understand. The biggest problem is that you are counting the number of women, but not accumulating the heights, there is no way to…
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answers124
viewsA: How to verify that the email is already registered in the database?
That? [HttpPost] [ValidateAntiForgeryToken] public ActionResult Create([Bind(Include = "Id,Nome,Email,Senha")] Pessoa pessoa) { if (pessoa != null) { if (db.Pessoas.Where(w => w.Email ==…
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answer321
viewsA: What would be the difference between fields and variables in C#?
I’ve shown you before what a variable. The field is a member of a data structure, i.e., of a type such as struct or class that contains a state, ie a value. This value can be constant or variable.…
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answer575
viewsA: How to use "if-Else" sets correctly in C?
Not perfect indented and not well organized, not so easy to read and this is a complicator. There is a typo where there is a print() when it should actually be printf(). See how easy it is to follow…
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answer142
viewsA: How to set the Index of a List to start at 1 instead of 0 when populated
It’s not possible, and it’s not because it doesn’t make sense, it’s not necessary. Using your example, let’s assume you have an i that starts at 1, just access by subtracting 1 and it’s solved,…
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answer84
viewsA: How to assign character array in a structure?
The code has a huge amount of errors, it’s not just what is described. I don’t even know if I will talk about all. It’s mixing concepts. Either it creates a vector of films inside the structure or…
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answers297
viewsA: Question about a C++ function that functions as a destructor?
C++ is a language that gives you the freedom to do powerful and flexible things. And it requires a lot of responsibility to manage all resources. When you instantiate an object there are basically…
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answer99
viewsA: How to create an extension method for the type of a class in VB.NET
There is no way, after all extension methods are made to operate on top of an instance. If you don’t want to operate on an instance then there’s no point in doing it. You probably just want a…
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answers64
viewsA: Why doesn’t the loop print up to the last value that was entered as the limit?
The problem is the comparison operator. You are having repeat while the value of the control variable inicio is less than fim, then you’ll finish a number first, because the moment it’s equal is no…
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answers148
viewsA: Open connection more than once in C#
Why capture an exception to launch it again? What advantage do you think you have in this? There is only disadvantage! Why close something that will be closed more robust and correct at the end of…
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answer75
viewsA: How to set only one row of the column in which all values in this column are equal?
Putting faith in what he explained in the comments would be this: update suite set ocupado = 'S' where tipo = 'i' and ocupado <> 'S' limit 1; I put in the Github for future reference. So you…
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answer327
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answers2508
viewsA: Difference between commands to stop execution
break Just comes out of a loop and does not finish the application, it is less than a return. Up to a return can close the application when it is in the same function as the input point. sys.exit()…
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answers89
viewsA: Closure and Magical Methods
Which of the two methods is best considered when it comes to good programming practices? I have only these two options or I can have my own options? Forget this good practice business. That’s for…
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answer195
viewsA: What are the differences between Object.Freeze() and Object.Seal()?
Are there differences between Object.Freeze() and Object.Seal()? If so, which ones? The seal() puts a metaproperty on the object indicating that properties cannot be added or deleted. Remembering…
javascriptanswered Maniero 444,682 -
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answers694
viewsA: The code skips the fgets, not reading the word
The simple way to do this is to use the scanf() even so in a simpler way and organized in the code: #include <stdio.h> #include <string.h> int main() { float altura, peso; char sexo[10];…
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answer123
viewsA: How to make the program stop at each printf?
When you need to take described data, i.e., text, you need to store it in strings, so you need to create an array of char with enough size for the amount of characters that will store 1 more…
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answers359
viewsA: Keyword "new" in C#
Roughly speaking we can say that an instance is an object. In this case we are saying that it is creating an object of a specific type. When we write the code we create two things, a data structure…
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answer279
viewsA: Error handling exceptions - "Undefined object reference for an instance of an object"
public String IdentificarAcessoDAL(FuncionarioDTO acesso) { try { conexao.cmd.Connection = conexao.conexao; conexao.cmd.CommandText = "SELECT CARGO.NOME_CARGO FROM LOGIN INNER JOIN FUNCIONARIO ON…
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answers1938
viewsA: GET service - System.Nullreferenceexception: 'Object Reference not set to an instance of an Object. '
The error is self-explanatory, you are trying to access an object that has not been instantiated, then its value is null, there is nothing you can do with it and so gives an error. The solution to…
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answer178
viewsA: Row function in C
Valgrind has no way of stating what its code is doing for sure, if this were possible it would have already been incorporated into the compiler. This tool is an external aid that helps identify…
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answer259
viewsA: Is the Node server the only option to support maximum level of requests in an application?
The type of technology used affects the ability to meet demand a little, but what really matters is the overall architecture, is to know what you’re doing. The least of the problems is usually which…